Try this

#932
ollie
Participant

• Attach a split 30 x20 tee
• Weld on a FB flanged by weld ball valve ( this would be a specialty item ie a modified Flg. BV )
• Attach hot tap drill to Flange face of BV
• Open BV
• Drill hot tape
• Withdraw drill
• Close BV
• Continue branch connection from Flange face of BV